NVidia’s Tegra tool seems the best (even has integrated mesh viewer). Qualcomm’s Adreno tool is also quite good. ARM’s MALI tool is difficult to set up (rooting), but covers the essentials. Intel’s GPA tool is a complete suite, but is only a system usage profiler for Android. Imagination’s PowerVR tools appear good, though I haven’t tested them yet (one tool requires rooting). Vivante provides no tools. Desktop tools not listed.